Haubold



1962 D. HAUBOLD 3,058,114

STAPLE DRIVING MACHINE Filed Nov. 30, 1959 5 Sheets-Sheet l INVENI'OP Dc fitcr Haubo/cl ATTQI NESS Oct. 16, 1962 D. HAUBQLD STAPLE DRIVING MACHINE 5 Sheets-Sheet 2 "VI EN??? Odefcr Haubo/al Filed Nov. 30, 1959 Oct. 16, 1962 D. HAUBOLD STAPLE DRIVING MACHINE 5 Sheets-Sheet 3 Filed Nov. 30, 1959 INVENTOP Dieter Hczubo/d ATTOLNESS Oct. 16, 1962 D. HAUBOLD 3,058,114

STAPLE DRIVING MACHINE Filed Nov. 50, 1959 5 sheets sheet 4 INVENTO? Die tar Hczubo/c! ATTOKNESS 1962 D. HAUBOLD 3,058,114

IIIIIIIIIIIIIIIII NE eeeeeeeeeeee t5 United States Patent 3,05%,114 STAPLE DRIVING MACHINE Dieter Haubold, Lutzowstrasse 8-10, Hannover, Germany Filed Nov. 30, 1959, Ser. No. 856,223 Claims. (Cl. 13.1)

This invention relates to a machine for driving fastening means, such as staples, tackers, bolts, rivets etc., into a workpiece. The fastening means are used in strips combining a number of them. Each strip is inserted into the magazine of the machine, and through a track-way the single staples or other fastening means are driven into the workpiece. If the machine is for industrial use the driver is in many cases operated by compressed air. It may, however, also be actuated by hand through spring force.

To remedy disturbances in the feeding of staples, once they occur, and to obviate damage to the trackway or to the staple driver by jammed staples it is common practice to provide for a certain yield of the front wall of the trackway so that it can set back if there are any disturbances with the staple driver moving downwards in it, and to open the trackway for remedy after the staple has been sent out of the magazine. However, the putting into practice of this idea results in a rather complicated construction and involves a further disadvantage in that the spring which is to be mounted at the front wall and kept in position by screws renders it impossible to have an even surface of the front part of the machine and thus obstructs its use near projecting parts of the workpiece.

It is one of the main objects of the present invention to provide a new and improved construction of the trackway, according to which working disturbances can easily be remedied and in which the trackway is protected against damages, such as those caused by jamming of the fastening means.

Another object is to provide a new and improved staple magazine which is in connection with the trackway into which the fastening means are inserted from below.

Another object is to form the connection between trackway and magazine in such a way that the trackway is automatically laid bare by the working stroke of the driver if there are any disturbances in the feeding of the staples.

According to a further object of the invention a new and improved construction of a lock for the plate closing the magazine from below is provided to enable a more convenient opening of the trackway for elimination of disturbances, and of the magazine for insertion of the staple strip.

The above and other features of the invention will now be described with reference to the accompanying drawings, which form part of this specification, and in which:

FIG. 1 is a view and partial section respectively of an air-operated stapling machine in its working position;

FIG. 2 is a partial section of the staple magazine and trackway showing their respective positions when disturbances occur;

FIG. 3 is a view from below of the staple magazine in its working position;

FIG. 4 is a section in the line IV--IV of FIG. 1;

FIG. 5 is a partial longitudinal, and

FIG. 6 a partial cross section taken in the line VIVI of FIG. 5 of a modified embodiment of the magazine;

FIG. 7 is a partial longitudinal section,

FIG. 8 a view from below, and

FIG. 9 a view from behind of another modification of the magazine;

FIG. 10 is a longitudinal section of still another modification of the magazine;

FIG. 11 is the locking device of FIG. 10 in an enlarged scale;

FIG. 12 shows in section the magazine of FIG. 7 when it is opened for loading;

FIG. 13 is a side view of the magazine of FIG. 12.

According to FIGS. 1-4, the stapling machine consists of a casing 1, which is in the shape of a handle and at its rear end can be connected to a compressed air supply by means of a socket piece 2, to which a hose is secured. The front portion 3 houses a movable working piston, which is not shown in the drawing, and, when operated by compressed air, moves a driver in the trackway 4 in downward direction. The compressed air supply is controlled by a valve which is actuated by a hand lever 5. In the lower part 6 of the machine a staple magazine 7 is arranged, into which a strip of staples 8 is inserted. The latter rests on a rail 9 of double T-shaped section, on which a staple follower 1G is mounted. Connected with this part 10 is a coil spring 11, which is guided over a roll 12 in the front part of the machine and at the other end fastened to the casing 6 at the point marked by 13. The coil spring 11 forces the follower 10 against the strip of staples 8, which thus is moved on towards the trackway 4, where the driver is operated to engage them one by one and drive them into the workpiece.

At its bottom the magazine 7 is closed by a plate 14, which at its rear end has a bent handle 15, which is used to move it rearwards when the magazine 7 needs refilling with another strip of staples, which strip is inserted from below.

As shown in FIG. 4, the plate 14 is mounted in two parallel longitudinal slots 20 of the lower part 6 of the casing and forms one part with the rail 9 for the staples 8.

At the front of the machine, the trackway 4 is closed by a rigid and even front wall 17, which may be fastened to the case 6 by, e.g., two screws 18. The rear wall 19 of the trackway 4 forms one part with the base plate 14 of the magazine 7 so that the trackway 4 can be opened together with the magazine 7.

At its rear end, the slidably mounted base plate has a transverse, wedge shaped slot 21. When the machine is in its working position as shown in FIG. 1 the wedge shaped end 22 of a leaf spring 23 fits into said slot 21. The spring 23 is fastened to a bracket 24 being screwed to the two ledges 16. Another transverse slot 25, shaped identically to slot 21, is provided in the front portion of the base plate 14 and engages the end 22 of leaf spring 23 when the base plate 14 is moved to open the magazine for refilling of stapes and thus limits its slide to hold its front end in the magazine.

If there are disturbances in the feeding of staples to the trackway 4, as this is shown in FIG. 2, a rearwardly directed pressure is exerted on the rear wall 19 of the trackway when the driver moves downwards. This causes the disengagement of the end 22 of the leaf spring 23 from the transverse slot 21 and thereby gives the base plate 14 a rearward shift. The inclined staples 8 can therefore not jam and damage the walls of the trackway when the driver engages them, and after lifting the machine from the workpiece one or a few idle strokes will eliminate the disturbance in that the driver transports the jammed staples out of the trackway 4, which, by the setting back of the rear wall 19, has been widened for this purpose. Should the staples have jammed as badly as to leave these strokes insuflicient they can easily be removed after the base plate 14 is farther moved out of the magazine for complete opening of the trackway. After these disturbances are cleared away the base plate is pushed back into its initial position so that the spring end 22 engages the slot 21. Now the machine is ready for operation again.

Referring to FIGS. 5 and 6, the staple magazine 7 is arranged in the body 30 of the machine and closed by a base plate 31, which slides in two longitudinal slots trackway 4, an additional unlocking device for the lever 72 is provided, which, similar to the construction in FIG. 6, consists of a push button 85 which is movable in the magazine bottom and projects out of its sidewall. The internal end of said push button is at its lower portion provided with an inclined surface 86, which is adjacent the also inclined surface of a horizontal arm 87 of the stop lever 72 so that the latter, when the push-button 85 is operated, is swung in clockwise direction around its pivot 73. Thereby the catch 75 disengages the bow 76 so that the magazine base plate 71 is unlocked and can be rearwardly moved out of the magazine body.

While I have described and illustrated my invention in certain embodiments, it will be understood that various changes may be made in the construction or assemblance of parts or other modifications be used to adapt the machine to changing requirements without parting from the spirit of the invention, which is set forth in my following claims.

I claim:

l. A magazine for a staple driving machine having a casing and a trackway, said magazine comprising a plate movably mounted in said casing, said trackway comprising a wall firmly connected with said casing and a wall firmly connected with said plate and movable therewith from an operative position in which the movable wall constitutes an integral part of said trackway to a retracted position and vice versa, resilient means retaining said plate in said operative position to enable it to move to said retracted position when rearward pressure is exerted upon the movable Wall and manually operable means connected with said retaining means for releasing said plate.

2. A magazine for a staple driving machine having a casing and a trackway, said magazine comprising a plate movably mounted in said casing, said trackway comprising a wall firmly connected with said casing and a wall firmly connected with said plate and movable therewith from an operative position in which the movable wall constitutes an integral part of said track-way to a retracted position and vice versa, a stop lever swingably mounted upon said plate, a swingable member engaging said stop lever in said operative position, springs engaging said stop lever and said swingable member for maintaining them in engagement, and a movable push button carried by said casing and having a surface adapted to engage said stop lever and move it out of engagement with said swingable member.

3. A magazine for a staple driving machine having a casing and a trackway, said magazine comprising a plate movably mounted in said casing, said trackway comprising a wall firmly connected with said casing and a wall firmly connected with said plate and movable therewith from an operative position in which the movable wall constitutes an integral part of said trackway to a retracted position and vice versa, said plate having a transverse recess formed therein, and a leaf spring connected to said casing and having an end fitting into said recess to lock said plate in said operative position and to release said plate to enable it to move to said retracted position when rearward pressure is exerted upon the movable wall.

4. A magazine for a staple driving machine having a casing and a trackway, said magazine comprising a plate movably mounted in said casing, said trackway comprising a wall firmly connected with said casing and a wall firmly connected with said plate and movable therewith from an operative position in which the movable wall constitutes an integral part of said trackway to a retracted position and vice versa, a stop lever swingably mounted upon said plate, another plate swingably mounted in said casing and having a catch, said stop lever having an arm engaging said catch in said operative position, a spring engaging said stop lever, and another spring extending in the direction of movement of the first-mentioned plate and engaging the second-mentioned plate, whereby rearward pressure exerted upon the movable wall causes movement of the first-mentioned plate to said retracted position and compression of the secondmentioned spring.

5. A magazine for a staple driving machine having a casing and a trackway, said magazine comprising a plate movably mounted in said casing, said trackway comprising a wall firmly connected with said casing and a wall firmly connected with said plate and movable therewith from an operative position in which the movable wall constitutes an integral part of said trackway to a retracted position and vice versa, a stop lever swingably mounted upon said plate and having a catch, a swingable bow engaging said catch in said operative position, a spring engaging said stop lever, and another spring engaging said bow, whereby rearward pressure exerted upon the movable wall causes movement of said plate to said retracted position and compression of the second-mentioned spring.

References Cited in the file of this patent UNITED STATES PATENTS 1,271,548 Doig July 9, 1918 2,585,939 Julifs Feb. 19, 1952 2,585,942 Julifs Feb. 19, 1952 2,910,698 Paxton Nov. 3, 1959 Oct. 16, 1962 T. CATLIN ETAL CAPTIVE PISTON STUD DRIVER 2 Sheets-Sheet 1 Filed Jan. 25, 1958 INVENIORS ROBERT T. CATLIN JOHN C RKE SNEX y a Hzi-w 55/144 .3. WW M ATTORNEYS 

